What order to teeth fall out

Hi, my son is 6 and has two wobbly top teeth, he's recently been for a check up at the dentist and he said it's rare for the top ones to fall out first and he asked if he has a medical problem. Has anyone else lost the top teeth first?

I would be inclined to ask your dentist what he may have been referring to. My dd booth milk teeth came out first. Her top front ones only fell out once her adult teeth were nearly through! It took a few months then for these teeth to position themselves correctly.